eroso-|ɪˈrəʊsəʊ-|combining form of L. ērōsus(see erose) in eˌroso-ˈdentatea.Bot. and Zool.(see dentate), toothed irregularly, as if bitten (Treas.Bot.). eˌroso-denˈticulatea.Zool.(see denticulate).1848Dana Zooph. 270 The upper margin of the coral is very fragile and eroso-dentate.Ibid. 261 Lamellæ finely eroso-denticulate.